Just after losing 25 pounds for his role in Nightcrawler, Gyllenhaal immediately began training at Floyd Mayweather's gym to get back to his normal weight and then add another 15 pounds of pure muscle. Director Antoine Fuqua said he was so dedicated to training, he pulled a Whiplash and broke up with his girlfriend because she was a distraction.

Gyllenhaal is quickly becoming one of the most interesting big name actors working today, something we never thought we'd say about the guy from Prince of Persia. But, with his work in Enemy, Nightcrawler and now this film, he's legitimately trying new things. He even turned down the lead role in Suicide Squad because he was sick of doing studio action movies.

Our only beef is that we wish the movie itself looked a little better. If you've seen a boxing/sports movie about a down-on-his-luck guy who needs to regain his glory to win back his family, you've seen them all. It doesn't help that Gyllenhaal looks like he's delivering a truly impressive performance and then there's 50 Cent, who's sleepwalking through his role.

Here's a little more about the film:

Billy “The Great” Hope (Gyllenhaal) is the reigning Junior Middleweight Champion whose unorthodox stance, the so-called “Southpaw,” consists of an ineloquent, though brutal, display of offensive fighting…one fueled by his own feelings of inadequacy and a desperate need for love, money and fame. With a beautiful family, home and financial security, Billy is on top both in and out of the ring until a tragic accident leaves his wife dead and sends him into a downward spiral. His days now an endless haze of alcohol and prescription drugs, his daughter taken by Child Services and his home repossessed by the bank, Billy’s fate is all but sealed until a washed up former boxer named Tick agrees to take the bereaved pugilist under his wing so long as he agrees to his strict ethos. Relentless and utterly committed to a fighter that thinks as much as he throws punches, Tick rebuilds Billy into a new man: one that is agile, fearsome and uncompromising in the ring while thoughtful, loving and disciplined outside of it. Now, as he works to regain custody of his daughter and mounts a professional comeback, Billy must face his demons head-on as he learns that, sometimes, your greatest opponent can be yourself.

Even if it's not the greatest movie, it looks like it at least features yet another remarkable performance from Gyllenhaal.